[3.0-Triple]Remove auto wrap when attachment is an object instance

[guohao]

What is the purpose of the change

1. Do not wrap object in attachment
2. Fix triple server thread pool name's typo
3. Remove hanlded exception info from metadata

Brief changelog

Verifying this change

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Add some description to dubbo-website project if you are requesting to add a feature.
• GitHub Actions works fine on your own branch.
• If this contribution is large, please follow the Software Donation Guide.

[codecov-commenter]

Codecov Report

Merging #8473 (41b18d7) into 3.0 (6808f8f) will decrease coverage by 0.08%.
The diff coverage is 22.22%.

@@             Coverage Diff              @@
##                3.0    #8473      +/-   ##
============================================
- Coverage     62.84%   62.75%   -0.09%     
+ Complexity      312      311       -1     
============================================
  Files          1112     1112              
  Lines         46633    46620      -13     
  Branches       7016     7012       -4     
============================================
- Hits          29306    29258      -48     
- Misses        14064    14095      +31     
- Partials       3263     3267       +4     

Impacted Files	Coverage Δ
...ache/dubbo/rpc/protocol/tri/UnaryClientStream.java	24.59% <0.00%> (-0.41%)	⬇️
.../apache/dubbo/rpc/protocol/tri/AbstractStream.java	45.45% <28.57%> (+2.59%)	⬆️
...dubbo/common/status/support/LoadStatusChecker.java	46.15% <0.00%> (-15.39%)	⬇️
...in/java/org/apache/dubbo/common/utils/JVMUtil.java	81.13% <0.00%> (-11.33%)	⬇️
...nt/metadata/StandardMetadataServiceURLBuilder.java	85.36% <0.00%> (-4.88%)	⬇️
...ster/router/condition/config/ListenableRouter.java	26.82% <0.00%> (-4.88%)	⬇️
...ubbo/rpc/protocol/dubbo/ChannelWrappedInvoker.java	43.47% <0.00%> (-4.35%)	⬇️
...etadata/report/support/AbstractMetadataReport.java	57.89% <0.00%> (-3.83%)	⬇️
...he/dubbo/registry/multicast/MulticastRegistry.java	63.42% <0.00%> (-3.25%)	⬇️
...org/apache/dubbo/rpc/protocol/AbstractInvoker.java	65.76% <0.00%> (-2.71%)	⬇️
... and 15 more

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